Casablanca was made using the studio system and was a collaborative effort. Everyone who worked on the film played a part in it's success, even if it is a minor part. Due to the studio system the director was not the 'auteur' of the film however did still play a huge part in its success and is one of the main reasons the film is the way it is. The producer and writers also played a big part in the success of the film and had a lot of input on the final result. Casablanca is a very dialogue heavy movie and too much dialogue can get boring quickly which will make the audience lose interest, it's because of the writers that this is not the case with Casablanca as it is filled with memorable and entertaining lines.
The editor also played a part in the movies success as it is the editor who pieced the movie together from the footage that was filmed and who cuts between different shots and scenes effectively. The cast also play a big a big part in the movies success at it is their job to bring the characters that they play to life and make them interesting and entertaining to watch. Extras also played a part, the use of extras in the background helps to bring the world of Casablanca to life and also helps the audience to understand parts of the film. For example, the large amount of extras in Rick's Cafe shows just how popular of a place it is, if there were no extras in the cafe the in would make the place seem dull.
The success of the movie isn't just due to people who worked on it. Parts of the film's success is also due to external factors. For example the timing of the film's release was perfect due to recent events in the war and helped draw in a larger audience.
